Is the transmit power of a thermal imager compensated by software or achieved by configuring the sensor?

littleshrimp

Is the transmit power of a thermal imager compensated by software or achieved by configuring the sensor? [Copy link]

Is the transmit power of a general thermal imager achieved by reading the sensor data normally and then compensating it with software, or is it achieved by configuring the sensor like some infrared temperature sensors?

chunyang

A thermal imager is a special type of digital camera that calculates the corresponding temperature by analyzing the intensity of the infrared spectrum components obtained by the image sensor. Similar to a digital camera, in addition to software compensation of the data, the exposure must be controlled first. In theory, there are also aperture, shutter and ISO parameters. However, controllable aperture and shutter are generally meaningless for infrared thermal imagers. The lens works at the maximum aperture, so there is no adjustable aperture and shutter physically. The exposure can be controlled by adjusting the ISO and exposure time of the sensor, which is similar to the situation of a mobile phone camera.

chunyang

But I find one thing strange. Thermal imagers are passive devices. What do you mean by "transmitting power"?

littleshrimp

chunyang posted on 2021-7-2 21:14 But I find it a little strange. Thermal imagers are passive devices. What do you mean by "transmitting power"?

Transmit power refers to the transmit power of the material being tested and is set according to the characteristics of the material.

littleshrimp

chunyang posted on 2021-7-2 21:14 But I find it a little strange. Thermal imagers are passive devices. What do you mean by "transmitting power"?

It's wrong. It should be "emissivity".